Oven wall construction



ly 4 c. L. GEHNRICH OVEN WALL CONSTRUCTION 2 Sheeds-Sheet l Filed June 16, 1959 l I lNVENTOl I (lurks L fiehzn'z];

Jul 2, 1946.

"C. L. GEHNRICH OVEN WALL consmucnon 2 Sheets-Sheet. 2

Filed June 16, 1939 V INVENTQR i marhsLf/Mumk ATTORNEY Patented July 2,

H UNITED STATES PATENT OFFICE OVEN WALL CONSTRUCTION Charles L. Gehnrich, Elmhurst, N. Y. Application June s, 1939, Serial No. 279,483

1 Claim.

Various other objects and advantages will be apparent as the nature of the invention is more fully disclosed.

The invention may be better understood by referringto the following description, taken in connection with the accompanying drawings, in which a specific embodiment thereof has been set forth for purposes of illustration.

In the drawings:

Fig. 1 is a broken horizontal section through an ovenwall embodying the present invention;

Fig. 2 is a vertical section taken along the line 2-2 of Fig. 1; V

Fig; 3 is a broken side elevation of the oven wall;

Fig. 4 is an enlarged detail view showing the corner construction; and

Fig. 5 is a partial perspective view showing the construction of one of the top plates.

Referring to the drawings-more in detail, the oven wall is shown as of three-ply construction, comprising an inner ply iii, an intermediate ply II and an outer ply l2. Each of said plies is built up from a plurality of panels which are assembled to form a substantially continuous wall. In accordance with the present invention, the various plies are held together in the manner to be described and without the use of any through metal which would be capable of trans-- ferring heat through the oven walls.

The inner ply I is formed of a plurality of panels M, each of which may comprise a body of heat insulating material having an inner metallic facing l5. The facing i is shown as extending around the ends of the insulating material to form'a tongue I6 at one end and a groove I! at the opposite end, the tongue and groove being shaped and dimensioned to receive the corresponding elements of adjacent panels. Each panel preferably extends from the top to the bottom of the oven, the construction being such that the oven may be built up to any desired length by joining a plurality of such panels together.

Referring to Fig. 1, it will be noted that the corner panels l8 are of similar construction except that they are bent at right angles so as to form a closed corner.

The intermediate ply H is shown as comprising a layer of sheet insulating material which may be formed in a plurality which preferably extends from the top to the bottom of the oven. The ply I i may also be'built up to any desired length by use of the required number of panels.

which are of similar construction to the panels M, above mentioned, and may comprise a layer of heat insulating material 2i provided with an outer facing 22 of metal which may be bent around the opposite edges to form grooves 24.

The panels above described are assembled on a base or bottom member 30, preferably of metal, having outer flanges 3i and inner flanges 32. The flanges 32 may be secured to the member in any convenient manner and, with the flanges 3|, form channels extending around the sides and back to receive the upright side and back wall sections. It is to be understood that the front wall is formed by suitable doors, not shown.

The side and back walls are each formed of the inner, intermediate and outer plies, above mentioned, which are built up to a length corresponding to the oven dimensions and are positioned in the channels formed between the flanges 3i and 32. A top plate 35 (Fig. 5) is positioned over the top of the inner wall panels M. This plate 35 may be of a suitable length to span a plurality of panels and may, if desired, be made of a length corresponding to that of the oven. The plate may be formed from a single sheet of metal which may be bent to provide an inner horizontal flange 36 and a channel 37 adapted to extend over and frictionally engage the top portions of the various panels. An outer vertical flange 38 may be formed adjacent the channel 31 to provide a shoulder against which the top panel of the oven may be positioned in the manner to be described. The outer wall panels 20 assembled, as described above, with the top plates of panels l9, each of w The outer ply l2 comprises a plurality of panels w tongues 23 and W may be provided with a channel-shaped top plate 8| and 40 in position and with the intermediate ply ll forming a complete heat insulating blanket between the inner and outer plies, the top may be assembled in the following manner:

The top wall oi the oven is built up of inner panels 45, intermediate panels 48 and outer panels 41 which are similar in construction to the corresponding panels oi. the side walls. These top panels preferably extend across the entire width 01 the oven, but are built up to the length of the oven by positioning successive panels end to end in the manner described in connection with the side walls. The inner top panel 46' is positioned on the top plate 35 with its ends engaging the vertical flange thereoi. The intermediate panel 46 is positioned over the inner panel 45 and extends over the top ends of the intermediate panels ll of the side walls. The outer panel 81 is positioned'on the intermediate panel 48 and is fitted between the top plates 40 of the outer panels 20 01' the side walls.

After the oven has been built up in this manner, horizontal and vertical corner pieces 5|) and 5! respectively are brought into position and are clamped by suitable tie-rods 52 which complete the assembly and form a firm, rigid unit.

It is to be noted that in the above construction the intermediate ply ll extends entirely around the sides, back and top of the oven and forms a continuous heat insulating blanket between the inner and outer wall panels. The inner and outer plies are each formed of a plurality of panels which are dove-tailed together and built up to the required oven length and are held in a firm unit without the use of through-bolts or other metallic members which could conduct heat through the oven walls. The construction, furthermore, permits the efilcient use of various heat insulating materials. The inner wall panels, for example, are subjected to the high temperatures of the oven and requires. heat insulating material of a relatively high grade. The inner metal facing l5 must also be of a suitable material to withstand the high temperatures of the oven. The intermediate ply, being shielded iirom the intense heat of the oven by the inner wall panels, may be of a lower grade heat insulating material, and the outer panels, which are subiected to only a relatively low temperature, may be made of a still lower grade heat insulating material. In this way the oven may be economically constructed with the use of materials, each of which is best adapted for its particular function. The outer ifacing 22, of course, need not be made oi heat resisting metal, but may be made of any material capable of withstanding the conditions to which it is subjected.

It is to be understood, or course, that, in the case of comparatively small ovens, each of the wall sections may comprise only a single panel, in which case outer tie-rods located .at the front and rear corners or the. oven may provide a sufficient support for the entire furnace. If the oven is built up of a plurality of panels, it may bedesirable to provide a plurality of such supports spaced along the sides thereof.

Although a specific embodiment has. been shown for purposes of illustration, it is to be understood that various changes and modifications may be made therein as will readily appear to a person skilled in the art. The invention is only to be limited in accordance with the scope of the following claim.

I claim:

An oven, comprising walls formed of inner, intermediate and outer plies, said inner and outer plies each comprising a plurality of panels, each of said panels comprising a body of heat insulating material and a metal facing on'the exposed side, said metal facing extending around the opposite ends of said panelsv to form tongues and grooves respectively, adjacent channels being joined together by said tongues and grooves to form a substantially continuous ply, said intermediate ply consisting entirely or panels of heat insulating material and forming a complete heat insulating blanket between said inner and outer plies without metallic members extending there-' CHARLES L. GEHNRICH. 

